Firstly, they are not at all windproof, as stated here.
They aren't supposed to be; they are a lightly insulated glove with a hardface to be somewhat wind resistant and to have some moisture shedding ability in temperatures from maybe 35 to 45 degrees F. , or to be used as a liner in a shell. But they are way overpriced for that purpose and the features they have.

My biggest complaint about them is the stitching/seams in the palm is/are uncomfortable when riding a bike and, I am sure, for many other activities. There's just too much of it, and the seams are too big.

I also think they should be windproof, or nearly so. I have many Arc'teryx jackets, and I really appreciate the ones that aren't completely windproof (e.g. the Gammas and theEpsilons ), because when you are working hard in colder environs, having some controlled amount of the wind blowing through your shell really helps in getting rid of the sweat. But I disagree with making that choice for your hands; your hands are small with a high surface area and are much more susceptible to the cooling effects of wind than your torso, and I find that having WindStopper in gloves is a good idea.

I don't understand all the great reviews for these gloves. They are not very warm, yet many of the reviews say they are - maybe if you are from the south they seem warm to you. They are not very wind resistant, and they are way overpriced. I think people either people are just enamored with their new Arc'teryx product (which is certainly apt to happen), they are reviewing the wrong glove (it can get confusing - I had to look up which ones I bought), or maybe they're just from places where they think 45 degrees F is frigid.